ci.yml

name: CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

# Cancel in-progress runs for the same branch/PR to save resources
concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  build-and-test:
    name: Build & Test (Swift 6.2+)
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up Swift
        uses: swift-actions/setup-swift@v2
        with:
          swift-version: '6.2'

      - name: Verify Swift installation
        run: swift --version

      - name: Cache SPM dependencies
        uses: actions/cache@v4
        with:
          path: .build
          key: ${{ runner.os }}-spm-${{ hashFiles('Package.swift', 'Package.resolved') }}
          restore-keys: |
            ${{ runner.os }}-spm-

      - name: Build
        run: |
          set -o pipefail
          swift build 2>&1 | tee build.log

      - name: Run tests with coverage
        run: |
          set -o pipefail
          swift test --enable-code-coverage 2>&1 | tee test-output.log

      - name: Check code coverage
        run: |
          CODECOV_JSON=$(swift test --show-codecov-path)

          if [ ! -f "$CODECOV_JSON" ]; then
            echo "Could not find coverage JSON at $CODECOV_JSON"
            exit 1
          fi

          COVERAGE=$(python3 -c "
          import json, sys
          with open('$CODECOV_JSON') as f:
              data = json.load(f)
          files = data.get('data', [{}])[0].get('files', [])
          covered = 0
          total = 0
          for f in files:
              # Only count project source files, not dependencies
              if '/Sources/JPEGLS/' in f['filename'] or '/Sources/jpeglscli/' in f['filename']:
                  covered += f['summary']['lines']['covered']
                  total += f['summary']['lines']['count']
          pct = (covered / total * 100) if total else 0
          print(f'{pct:.2f}')
          ")

          echo "Source code coverage: ${COVERAGE}%"

          THRESHOLD=95
          if [ "$(echo "$COVERAGE < $THRESHOLD" | bc -l)" -eq 1 ]; then
            echo "FAIL: Code coverage ${COVERAGE}% is below the ${THRESHOLD}% threshold."
            exit 1
          else
            echo "PASS: Code coverage ${COVERAGE}% meets the ${THRESHOLD}% threshold."
          fi

      - name: Upload build log
        if: failure()
        uses: actions/upload-artifact@v4
        with:
          name: build-log
          path: build.log
          retention-days: 7

      - name: Upload test output
        if: failure()
        uses: actions/upload-artifact@v4
        with:
          name: test-output
          path: test-output.log
          retention-days: 7